Alexandra Maria Guarnaschelli is an American chef, cookbook author, and television personality. She currently holds the position of executive chef at New York City's Butter restaurant. Prior to this, she was the executive chef at The Darby restaurant before its closure in 2013. Guarnaschelli is a familiar face on Food Network, appearing as a judge on 'Chopped' and 'Guy's Grocery Games', and as a competitor on 'Iron Chef America'.